EP4448383A1 - Système de transmission de commande à un servo actionneur hydraulique - Google Patents
Système de transmission de commande à un servo actionneur hydrauliqueInfo
- Publication number
- EP4448383A1 EP4448383A1 EP22850585.5A EP22850585A EP4448383A1 EP 4448383 A1 EP4448383 A1 EP 4448383A1 EP 22850585 A EP22850585 A EP 22850585A EP 4448383 A1 EP4448383 A1 EP 4448383A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- channel
- motor
- control device
- command
- control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C13/00—Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
- B64C13/24—Transmitting means
- B64C13/38—Transmitting means with power amplification
- B64C13/50—Transmitting means with power amplification using electrical energy
- B64C13/505—Transmitting means with power amplification using electrical energy having duplication or stand-by provisions
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C13/00—Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
- B64C13/24—Transmitting means
- B64C13/38—Transmitting means with power amplification
- B64C13/40—Transmitting means with power amplification using fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C13/00—Control systems or transmitting systems for actuating flying-control surfaces, lift-increasing flaps, air brakes, or spoilers
- B64C13/24—Transmitting means
- B64C13/38—Transmitting means with power amplification
- B64C13/50—Transmitting means with power amplification using electrical energy
- B64C13/503—Fly-by-Wire
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/54—Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
- B64C27/58—Transmitting means, e.g. interrelated with initiating means or means acting on blades
- B64C27/64—Transmitting means, e.g. interrelated with initiating means or means acting on blades using fluid pressure, e.g. having fluid power amplification
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64C—AEROPLANES; HELICOPTERS
- B64C27/00—Rotorcraft; Rotors peculiar thereto
- B64C27/54—Mechanisms for controlling blade adjustment or movement relative to rotor head, e.g. lag-lead movement
- B64C27/58—Transmitting means, e.g. interrelated with initiating means or means acting on blades
- B64C27/68—Transmitting means, e.g. interrelated with initiating means or means acting on blades using electrical energy, e.g. having electrical power amplification
Definitions
- the technical field of the invention is that of the flight controls of an aircraft.
- the present invention relates to a control transmission system to a hydraulic servo actuator.
- the flight controls of an aircraft and in particular of a helicopter allow a pilot to control and modify the trajectory of the helicopter around the three axes: pitch, roll and yaw.
- the primary flight controls of a helicopter are essential to ensure safe flight and comprise three types of systems: a control transmitter system such as rudder control pedals, a collective pitch lever and/or a control throttles and a cyclic stick, control receiver systems such as a main rotor (blades) and an anti-torque rotor and finally control transmission systems between the transmitter and receiver systems, the transmission systems possibly being mechanical and hydromechanical .
- a hydromechanical transmission comprises two circuits: a mechanical circuit comprising, for example, cables and pulleys and connecting the cockpit controls to a hydraulic circuit, the hydraulic circuit comprising hydraulic pumps, reservoirs, pipes, valves/servovalves and hydraulic actuators.
- the pilot issues a command, by acting on the commands in the cockpit, which are transmitted by the mechanical circuit to the hydraulic circuit which implements the hydraulic actuators to move the main rotor and tail rotor.
- Hydromechanical transmissions are widely used in helicopters, however a few helicopters with electric transmissions have been developed.
- the use of a Fly-By-Wire architecture is advantageous in aircraft because the mechanical transmissions between the controls operated by the pilot and the control surfaces of an aircraft are replaced by electrical transmissions, which makes it possible to reduce the physical effort exerted by the pilot.
- the Fly-By-Wire architecture is advantageous compared to the mechanical and hydromechanical architectures mentioned above because the Fly-by-Wire architecture is easy to install and to set up and makes it possible to have additional functions.
- an electrical transmission system makes it possible to control the rotors by the flight control computer (in English "FCC”: flight control computer) which has full authority and which determines their movement thanks to the speed, position, altitude, etc, of the helicopter via hydraulic actuators.
- FCC flight control computer
- the use of current electronic flight controls has a major drawback: a failure of the flight control computer and/or of the electrical transmission system of the flight controls to the hydraulic actuators can lead to the loss of capacity to control at least one axis of the helicopter, which results in the alteration of the apparatus.
- the invention offers a solution to the problems mentioned above, by making it possible to transmit electrical commands issued by a flight control computer to at least one hydraulic actuator, thanks to an electromechanical architecture offering high availability of flight controls. , while respecting a small footprint.
- a first aspect of the invention relates to a system for transmitting control to at least one hydraulic servo actuator comprising:
- At least one mechanical system comprising: o a rotary electric actuator comprising a first channel comprising a motor, and a second channel comprising a motor; o a linear electric actuator comprising a third channel comprising a motor, the linear electric actuator being connected to the rotary electric actuator by a first mechanical connection and being configured to be connected to the hydraulic servo actuator by a second mechanical connection;
- a control system comprising: o a first control device connected by an electrical connection to the first channel of the rotary electric actuator of said mechanical system, o a second control device connected by an electrical connection to the second channel of the actuator electric rotary valve of said mechanical system, o a third control device connected by an electric connection to the path of the linear electric actuator.
- control system is configured to operate according to at least one mode among the following operating modes: so-called nominal operating mode according to which: o the first control device is in an operational validity state , and is configured for:
- the second device is in a valid standby state and is configured for:
- the third control device is in an operational validity state and is configured for:
- So-called failure mode of the first control device which: o the first control device is in a non-operational validity state, o the control device is configured to switch from a standby validity state to an operational validity state , the change in state of the second controller resulting from the non-operating health state of the first controller, and is configured to:
- the third controller is in an operational health state and is configured to:
- the sum of each command received respectively by the motor of the first channel or the motor of the second channel and/or the motor of the third channel ensures the mechanical control of the hydraulic servo actuator.
- operational validity state of a control device is understood to mean a state during which the control device can receive commands transmitted by the computer, intended for the engine to which said control device is connected, and can transmit the commands to the engine to which said control device is connected and during which the control device can receive data via the channel to which it is connected.
- Standby validity state of a control device is understood to mean a state during which the control device receives data via the channel to which it is connected and during which the control device cannot transmit any command to the motor to which said control device is connected.
- defective state of validity of a control device means a state of validity during which the electrical connection between the control device and its channel is broken and no electrical communication between the two is possible.
- each command issued by the computer is distributed according to the operational control devices, which makes it possible to control the hydraulic servo-actuator even when a control device is defective, and to guarantee the availability of the controls.
- the control of the hydraulic servo-actuator is the result of at least one command received by a motor setting in motion the electric actuator in which said motor is included.
- a command transmitted by the computer to a control device comprises a position setpoint intended for the motor included in the track connected to said control device.
- the first channel comprises a motor position sensor and a rotary position sensor
- the second channel includes a motor position sensor and a rotary position sensor
- the third channel includes a third motor position sensor and a linear position sensor
- a datum received by one channel among the first, second and third channel concerning the operating parameters of this channel comprises: a datum concerning the position of the motor included in the channel and/or a datum concerning the position of the actuator in which is included in that way.
- the rotary position sensor included in the first channel is a position sensor of the rotary actuator.
- the rotary position sensor included in the second channel is a position sensor of the rotary actuator.
- the linear position sensor included in the third channel is a linear actuator position sensor.
- the aforementioned embodiment makes it possible to know the position of each motor and of each actuator so that the computer can recalculate the position command to each motor connected to an operational control device, the sum of each command making it possible to obtain a desired displacement of the servo-actuator.
- the rotary actuator is irreversible.
- the linear actuator is irreversible.
- control system is included in the rotary actuator or in the linear actuator.
- the first mechanical connection and the second mechanical connection are in series.
- the system comprises four mechanical systems. This embodiment advantageously makes it possible to control 4 servo-actuators.
- a second aspect of the invention relates to a control assembly for at least one hydraulic servo actuator comprising: a control module; a system according to the first aspect of the invention; at least one hydraulic servo actuator;
- a third aspect of the invention relates to an aircraft comprising a control system according to the preceding claim.
- FIG. 1 shows a schematic representation of a control assembly for at least one hydraulic servo-actuator, comprising a control transmission system according to the invention
- FIG. 2 is a diagram of a rotary electric actuator included in the transmission system according to the invention.
- Figure 3 is a diagram of a linear electric actuator included in the transmission system according to the invention
- Figure 4 is a diagram of one embodiment of a control device
- FIG. 5 is a diagram of the control assembly of at least one hydraulic servo actuator when the transmission system according to the invention is in a so-called nominal mode of operation;
- FIG. 6 is a diagram of the control assembly of at least one hydraulic servo actuator when the transmission system according to the invention is in a mode of operation called failure of the first control device;
- FIG. 7 is a diagram of the control assembly of at least one hydraulic servo actuator when the transmission system according to the invention is in a mode of operation called failure of the third control device.
- Figure 1 shows a schematic representation of an embodiment of the control assembly 1 of at least one servo-actuator.
- the set 1 is included in an aircraft.
- the aircraft is a helicopter.
- the control assembly 1 comprises a control module 10, a control transmission system 20 to at least one hydraulic servo actuator according to the invention and a hydraulic servo actuator 30.
- control assembly 1 comprises four hydraulic servo actuators 30.
- the control module 10 comprises at least one computer 11 and at least one power supply 12.
- the computer 11 includes a processor not shown in Figure 1.
- the computer is a flight control computer (FCC: Flight Control Computer).
- FCC Flight Control Computer
- the control module 10 comprises four computers 11 .
- the power supply 12 preferably comprises a first and a second output, not shown in Figure 1, each configured to deliver a voltage, preferably a DC voltage.
- the voltage value delivered by the first output 12a and/or the second output 12b is 28 volts.
- the transmission system 20 includes at least one electronic control system 22 and includes at least one mechanical system 21 .
- the control system 22 comprises a first, a second and a third control device 221, 222, 223, each control device being connected to the other two by an electrical connection.
- the mechanical system 21 comprises a rotary electric actuator 211 and a linear electric actuator 212.
- the rotary electric actuator 211 comprises a first channel 211 a linked by an electrical connection to the first control device 221 .
- the electrical connection includes at least one electrical signal.
- the electrical signal can be digital or analog.
- the rotary electric actuator 211 comprises a second channel 211b connected by an electrical connection to the first control device 222.
- the electrical connection comprises at least one electrical signal.
- the digital signal can be digital or analog.
- the linear electric actuator 212 includes a third channel 212c connected by an electrical connection to the third control device 223.
- the third electrical connection includes at least one electrical signal.
- the electrical signal can be digital or analog.
- the rotary actuator 211 is linked by a first mechanical link 213 to the linear electric actuator 212 and the linear actuator 211 is linked by a second mechanical link 214 to the hydraulic servo actuator 30.
- the first mechanical link 213 is preferably a pivot link and the second mechanical link 214 is preferably a pivot link.
- first mechanical connection 213 and the second mechanical connection 214 are in series.
- the transmission system 20 comprises four mechanical systems 21, each computer 11 being associated with a mechanical system 21 and to a hydraulic servo actuator 30 to which the mechanical system 21 is connected.
- Figure 2 is a schematic representation of the rotary electric actuator 211 included in the mechanical system 21 .
- the rotary actuator 211 includes the first channel 211a and the second channel 211b.
- the rotary electric actuator 211 may include a first reducer 211c and an output shaft 211d.
- the first channel 211a of the rotary actuator 211 comprises a motor a1, preferably a brushless motor, and a motor position sensor a2, configured to measure the position of the motor a1 of the first channel 211a.
- the motor a1 of the first channel 211a is a three-phase motor and comprises three three-phase inputs, not shown in Figure 2.
- the motor position sensor a2 of the first channel 211a is a Hall effect sensor (from the English "Hall Effect Sensor")
- the second channel 211b of the actuator 211 comprises a motor b1, preferably a brushless motor, and a motor position sensor b2, configured to measure the position of the motor b1 of the second channel 211b.
- the motor b1 of the second channel 211b is a three-phase motor and comprises three three-phase inputs, not shown in Figure 3.
- the motor position sensor b2 of the second channel 211 b is a Hall effect sensor.
- the output shaft 211d preferably comprises a first angular position sensor d1, a second angular position sensor d2, a brake d3, preferably a dual-feed electrically controlled dog clutch brake.
- the first angular position sensor d1 is connected to the first channel 211a
- the second angular position sensor d2 is connected to the second channel 211b.
- the first angular position sensor d1 is included in the first channel 211a, and the second angular position sensor d2 is included in the second channel 211b.
- the d3 brake is preferably a power failure brake.
- the first and second angular position sensor (d1, d2) are configured to measure the position of the rotary electric actuator 211 .
- the output shaft 211d comprises the dual-feed electrically controlled dog clutch brake
- said clutch brake makes it possible to ensure the irreversibility of the rotary actuator 211 .
- Figure 3 is a schematic representation of the linear electric actuator 212 included in the mechanical system 21.
- the linear electric actuator 212 includes the third channel 212c.
- the linear electric actuator 212 may include a reducer 212b, a brake 212a, a linear position sensor 212d and a ball screw 212e.
- Brake 212a is preferably a dual-feed, electrically operated dog clutch brake.
- the brake 212a is preferably a lack of current brake.
- the linear electric actuator 212 includes the electrically controlled dog clutch brake, the linear electric actuator 212 is irreversible.
- the third channel 212c of the linear electric actuator 212 comprises a motor c1, preferably a brushless motor, and a motor position sensor c2 configured to measure the position of the motor c1.
- the motor c1 of the third channel 212c is a three-phase motor and comprises a three-phase input, not shown in Figure 3.
- the motor position sensor c2 of the third channel 212c is a Hall effect sensor.
- the linear position sensor 212d is included in the third channel 212c.
- Figure 4 is a schematic representation of an embodiment of the first control device 221 included in the control system 22.
- the first, second and third control devices (221, 222, 223) have an identical architecture, only the first control device 221 is shown.
- the first control device 221 comprises a first control module 2211, a digital circuit 2212 and an actuation module 2213.
- the control module 2211 can comprise a first and a second power supply ports (2211a, 2211b), configured to receive an electric voltage, preferably a direct voltage with a value of 28V.
- the control module 2211 includes at least one control port 2211c.
- the plurality of input ports 222 comprises four control ports, each control port of which is electrically connected respectively to one computer among the four computers.
- the control module 2211 comprises a serial input data port 2211d (DSI: Data Serial Input), a serial output data port 2211e (DSO: Data Serial output).
- DSO Data Serial output
- control module 2211 includes a communication port, not shown in Figure 4.
- Said communication port is configured to receive software instructions, for example.
- the first control device 221 may comprise a filter module 2214 configured to process the signals transmitted by the control module 2211.
- the processing of the transmitted signals can for example be the reduction of the noise included in the received signals.
- the digital circuit 223 is configured to process signals received by the control module and transmit them to the actuation module 2213.
- the digital circuit 223 is configured to process signals received by the actuation module 2213 and transmit them to the control module 2211.
- the actuation module 2213 includes motor driver module 2213a, at least one data reception module 2213b and a brake driver module 2213c.
- the motor driver module 221 a comprises a three-phase output, the three-phase output comprising three electric currents, preferably three direct electric currents.
- the brake control module 2213c delivers a two-phase output, the two-phase output comprising two electric currents, preferably two direct electric currents.
- Data receiving module 2213 preferably includes two ports.
- the transmission system 20 operates according to at least one mode from among the following operating modes: so-called nominal operating mode, so-called failure operating mode of the first control device and so-called failure operating mode of the third control device.
- control devices can each be respectively in a state of validity among at least the following three states of validity: state of operational validity, state of validity on standby, state defective validity.
- operational validity state of a control device means a validity state during which the control device is configured to implement a plurality of operational steps described below.
- a first operational step is a step of reception by the control device of a datum via the channel connected to said control device, via the data reception module, the data relating to the operating parameters of said channel.
- the data concerning the operating parameters of the first channel comprises data relating to the position of the motor of the channel connected to the control device and/or data relating to the position of the electric actuator comprising the channel connected to the control device. order.
- a second operational step is a step of transmitting to the computer 10, via the command port 2211c, the data concerning the operating parameters received.
- a third operational step is a step of receiving a command sent by the computer 10, via the control port 2211c, intended for the motor of the track connected to the control device.
- the command to the motor is preferably a position command of said motor.
- the position command of said motor is a real value, preferably having a unit in mm.
- a fourth operational step is a step of sending the command to the motor included in the path connected to the control device.
- Standby validity state of a control device is understood to mean a state during which the control device is configured to implement standby steps.
- a first standby step is a step of reception by the control device of data via the channel connected to said control device, via the data reception module, the data concerning operating parameters of said channel .
- the data item relating to the operating parameters of the first channel comprises data item relating to the position of the first motor included in the track connected to said control device and/or data item relating to the position of the actuator comprising the track connected to the said control device.
- a second standby step is a step of transmitting to the computer 10, via the command port 2211c, the data concerning the operating parameters received.
- Defective state of validity of a control device means a state of validity during which the electrical connection between said control device and its channel is broken and no communication between the two is possible. In addition, the electrical connection between said control device and the computer 10 is broken and no communication between the two is possible.
- Each control device among the first, second and third control device (221, 222, 223) is configured to communicate its validity status to the other devices via the control module 2211 and more precisely via the output data port in 2211 e series.
- Each control device among the first, second and third control device (221, 222, 223) is configured to receive the validity status of the other devices via the control module 2211 and more precisely via the data port of serial inputs 2211d.
- Each control device among the first, second and third control device (221, 222, 223) is configured to communicate its validity status to the computer 10 via the control port 2211c.
- the computer 10 simultaneously sends a command to each control device being in an operational validity state, the command being intended for the motor of the track connected to said device.
- the command includes a desired position value fraction for the hydraulic servo-actuator 30.
- the fraction of the desired position value of the hydraulic servo-actuator 30 is determined di of a desired position value of the hydraulic servo-actuator and the number of operational control devices.
- the fraction of the desired position value is obtained by dividing the desired position value of the servo-actuator by the number of operational control devices.
- control of the hydraulic servo actuator 30 results from the sum of the values included in the commands received respectively by each control device being in an operational validity state.
- Figure 5 represents the control assembly 1, when the system according to the invention operates according to a so-called nominal operating mode.
- the motor a1 of the first channel 211 a receives a position command whose value is equal to X/2, allowing the rotary actuator 211 to move by a value equal to X/2 and to move the linear actuator 212 through the first mechanical connection.
- the motor c1 of the third channel 212c receives, simultaneously with the reception of the command by the motor a1 of the first channel 211a, a command in position transmitted by the computer whose value is equal to X/2, allowing to move the linear actuator 212 by a value equal to X/2.
- the linear actuator 212 receives an electrical command of value X/2, and a mechanical command of value X/2, the linear actuator therefore moves by a value X and makes it possible to move, via the second mechanical link 214 , the hydraulic servo actuator 30 according to a value X.
- Figure 6 represents the control assembly 1, when the system according to the invention operates according to a so-called failure mode of the first control device 211 .
- the first control device 211 is in a defective validity state
- the second control device 212 is configured to switch from a standby validity state to an operational valid state
- the change of state of the second controller 212 resulting from the non-operating valid state of the first controller 211 and the third controller 213 is in an operational valid state.
- the computer 10 when the mode of operation of the transmission system 20 according to the invention is said to be failure of the first device 221, when the computer 10 wishes to obtain a position of the hydraulic servo actuator of a value equal to X, the computer sends a command comprising a value equal to X/2 to the second operational control device 222, and a command comprising a value equal to X/2 at the third operational controller 223.
- the motor b1 of the second channel 211 b receives a position command whose value is equal to X/2, allowing the rotary actuator 211 to move by a value equal to X/2 and to move the linear actuator 212 through the first mechanical connection.
- the motor c1 of the third channel 212c receives, simultaneously with the reception of the command by the motor b1 of the second channel 211b, a command in position whose value is equal to X/2, making it possible to move the linear actuator 212 with a value equal to X/2.
- the linear actuator 212 receives an electrical command of value X/2, and a mechanical command of value X/2, the linear actuator therefore moves by a value X and makes it possible to move, via the second mechanical link 214 , the hydraulic servo actuator 30 according to a value X.
- the first control device 211 is in an operational validity state
- the second control device 212 is in a standby validity state
- the third device control 213 is in a faulty valid state.
- the computer 10 when the mode of operation of the transmission system 20 according to the invention is said to be nominal, when the computer 10 wishes to obtain a position of the hydraulic servo actuator of a value equal to X, the computer sends a command comprising a value equal to X to the first operational control device 221.
- the motor a1 of the first channel 211 a receives a position command whose value is equal to X, allowing the rotary actuator 211 to move by a value equal to X and to set in motion the linear actuator 212 through the first mechanical connection.
- the linear actuator 212 only receives a mechanical position command, equal to X.
- the linear actuator 212 therefore moves by a value X and makes it possible to move, via the second mechanical link 214, the hydraulic servo actuator 30 according to a value X.
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Automation & Control Theory (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fluid-Pressure Circuits (AREA)
- Gear-Shifting Mechanisms (AREA)
- Control Of Electric Motors In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR2113782A FR3130749B1 (fr) | 2021-12-17 | 2021-12-17 | Système de transmission de commande à un servo actionneur hydraulique |
| PCT/FR2022/052401 WO2023111484A1 (fr) | 2021-12-17 | 2022-12-16 | Système de transmission de commande à un servo actionneur hydraulique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4448383A1 true EP4448383A1 (fr) | 2024-10-23 |
| EP4448383B1 EP4448383B1 (fr) | 2025-09-10 |
Family
ID=81346604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22850585.5A Active EP4448383B1 (fr) | 2021-12-17 | 2022-12-16 | Système de transmission de commande à un servo actionneur hydraulique |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US12522348B2 (fr) |
| EP (1) | EP4448383B1 (fr) |
| FR (1) | FR3130749B1 (fr) |
| WO (1) | WO2023111484A1 (fr) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5806805A (en) * | 1996-08-07 | 1998-09-15 | The Boeing Company | Fault tolerant actuation system for flight control actuators |
| FR2835021B1 (fr) * | 2002-01-24 | 2004-04-16 | Snecma Moteurs | Ensemble d'actionnement a verins hydrauliques synchronises |
| US10730609B2 (en) * | 2016-03-03 | 2020-08-04 | Sikorsky Aircraft Corporation | Fly-by-wire retrofit kit |
-
2021
- 2021-12-17 FR FR2113782A patent/FR3130749B1/fr active Active
-
2022
- 2022-12-16 EP EP22850585.5A patent/EP4448383B1/fr active Active
- 2022-12-16 US US18/719,656 patent/US12522348B2/en active Active
- 2022-12-16 WO PCT/FR2022/052401 patent/WO2023111484A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| FR3130749A1 (fr) | 2023-06-23 |
| EP4448383B1 (fr) | 2025-09-10 |
| US12522348B2 (en) | 2026-01-13 |
| US20250066014A1 (en) | 2025-02-27 |
| FR3130749B1 (fr) | 2023-11-17 |
| WO2023111484A1 (fr) | 2023-06-22 |
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